i would skim and no lights, and would also seed with live rock in that container too. i think that if you are willing to get some die off and have a longer cycle in the main tank, you could do it in there. but understand that you will get a spike and recycle, and some of your live rock may die. also you will want to rinse the dead rock well because all of the little dead bodies that were in the live rock are now just stuck in there and will mess up your water.
i used a heated pressure washer, and mine has been in a trash can for a week with protein skimmer, powerhead, and heater. its about 40lb dead and 10lb live to seed the dead rock.